Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Real-time interactive duplex MR measurements: application in neurovascular imaging.

S G Wetzel1, V S Lee, A G Tan

  • 1Department of Radiology, New York University Medical Center, 530 First Ave., HCC Basement-MRI, New York, NY 10016, USA.

AJR. American Journal of Roentgenology
|August 23, 2001
PubMed
Summary

Real-time duplex MR imaging offers a new, reliable method for assessing blood flow dynamics in the brain and neck. This technique provides accurate hemodynamic information in real time, aiding neurovascular imaging.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Influence of blood pressure and body mass index on retinal vascular caliber in preschool-aged children.

Journal of human hypertension·2013
Same author

Lens retrodots and vacuoles and their associations with the prevalence and incidence of age-related cataract.

Eye (London, England)·2011
Same author

Fractal dimension of the retinal vasculature and risk of stroke: a nested case-control study.

Neurology·2011
Same author

Massive obscure-overt upper gastrointestinal bleeding secondary to hemobilia.

Endoscopy·2009
Same author

Retinal vessel wall signs and the 5 year incidence of age related maculopathy: the Blue Mountains Eye Study.

The British journal of ophthalmology·2003
Same author

Breath-hold fast recovery fast spin echo versus conventional non-breath-hold fast spin echo T2-weighted MR imaging of focal liver lesions.

Annals of the Academy of Medicine, Singapore·2003

Area of Science:

  • Medical Imaging
  • Cardiovascular Imaging
  • Neuroimaging

Background:

  • Phase-contrast MR imaging (PC-MRI) is crucial for assessing blood flow.
  • Cardiac gating is typically required for accurate PC-MRI.
  • A novel real-time interactive duplex MR imaging technique has emerged.

Purpose of the Study:

  • To evaluate the feasibility and reliability of real-time interactive duplex MR imaging.
  • To assess hemodynamic information in vitro and in vivo.
  • To investigate its application in carotid arteries and venous sinuses.

Main Methods:

  • Real-time duplex MR measurements were performed using specific parameters (TR/TE, 53/27; flip angle, 90 degrees; encoding velocity, 100 or 150 cm/sec).
  • Studies included a steady-flow phantom and 10 healthy volunteers measuring carotid artery and superior sagittal sinus velocities.

Related Experiment Videos

  • Data were compared with conventional PC-MRI and Doppler sonography.

    • Main Results:

    • High in vitro (0.99) and moderate in vivo correlations (0.83 carotid, 0.76 venous sinus) were observed between real-time duplex MR and conventional PC-MRI.
    • Real-time MR showed significantly lower velocity measurements in carotid arteries compared to conventional PC-MR and sonography, attributed to volume averaging.
    • Reliable identification of velocity changes in the venous sinus during hyperventilation was achieved with both MR techniques.

    Conclusions:

    • Real-time interactive duplex MR imaging is a feasible and reliable technique for neurovascular imaging.
    • It effectively quantifies hemodynamic information in real time.
    • This method holds promise for clinical applications in assessing blood flow.